Drill in concrete with the impact drill

With a hammer drill, walls made of concrete can usually be drilled well. That the most equipment such as picture hooks, wall cabinets and shelves are attached to walls, the drill is sufficient. However, if load-bearing concrete such as prestressed concrete comes into play on storey ceilings or foundations, the unit may fail.

Component and type of application determine the concrete hardness

There are many variations of concrete mixed with cement, water and various aggregates. For walls in private homes mostly concrete blocks are used, which belong to the softest mixtures. Non-load-bearing room walls and a large part of the outer walls are made of hollow blocks, where the required Bohrweg is limited.

Steel-hard concrete is quite literally used on load-bearing wall parts and chimney sheathing, in floor slabs, as stairs and in foundations. Since the operating principle of the percussion drill results in a relatively large loss of power, which also arises largely from the physical strength of the operator, the limit to the drilling capability can be achieved in such concrete types.

The machine type can be recognized on the drill chuck

A visible differentiator between a percussion drill and a hammer drill is the type of drill chuck. While a jaw chuck, whether designed as a quick-release or spider chuck, locks the drill by rotating movements, the function of a hammer drill requires an axially slidable SDS chuck.

Sudden disturbances during drilling

When drilling with the drill in concrete, it can happen that a "buttery" penetration abruptly ends up to a certain point. If a steel crash has been hit, turning off the percussion can help. In steel, the maximum lead of the drill must be turned into rotation.

In older buildings, at bay and wall projections and in outer walls, the concrete is occasionally mixed with gravel or pebbles. A hammer drill is unable to smash the stones. With luck the stones or pebbles break out. Again, short-term turn off the percussion help.

Tips & Tricks

When considering whether to buy a percussion drill or a hammer drill, you should consider different device combinations. Maybe a driller is sufficient for smaller holes. This saves a percussion drill and a cordless screwdriver. The money saved can be invested in a powerful hammer drill.

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